The reaction between HCl and NaHCO3 will be; HCl + NaHCO3 = NaCl + CO2 + H2O The relative formula mass of NaHCO3 is 84 g/mol Moles of NaHCO3 in 2 g will be; 2/84 =0.0238 moles The mole ratio of HCl and NaHCO3 is 1;1 Thus, the number of moles of HCl is 0.0238 moles The volume of HCl will be; = 0.0238 moles/0.2 = 0.119 liters or 119 cm³
It might be c, because he came up with the plum pudding model. or it might be that atoms of the same element are identical, but that's not true cuz ions are different and isotopes are different.
